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Author Question: What is the best-known and oldest deep-diving manned research submersible now in operation? a. ... (Read 74 times)

captainjonesify

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on: Aug 22, 2018

What is the best-known and oldest deep-diving manned research submersible now in operation?
  a. Trieste
  b. Jiaolong
  c. Challenger
  d. Alvin
  e. Shinkai



Question 2

It is estimated to take _____ for the ocean's volume to circulate through the oceanic crust at spreading centers.
  a. 1 million years
  b. 10 million years
  c. 100 million years
  d. 1 billion years
  e. 10 billion years



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jordangronback

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Reply #1 on: Aug 22, 2018
Answer to Question 1

d

Answer to Question 2

b


captainjonesify

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Reply #2 on: Aug 22, 2018
Both answers were spot on, thank you once again


jordangronback

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Reply #3 on: Aug 22, 2018
Great! Please up vote :D


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